Sunday, 29 October 2017

The Free moisture content in fine aggregate results in bulking of volume. Bulking phenomenon can be explained as Follows :

Free moisture forms a film around each particle. This film of moisture exerts what is known as surface tension which keeps the neighbouring particles away from it. Similarly, the force exerted by surface tension keeps every particle away from each other. Therefore, no point contact is possible between the particles. This cause bulking of the volume. The extent of surface tension and consequently how far the adjacent particles are kept away will depend upon the percentage of moisture content and the particle size of the fine aggregate. It is interesting to note that the bulking increases with the increase in moisture content upto a certain limit and beyond that the further increases in the moisture content results in the decrease in the volume and at a moisture content representing saturation point, the fine aggregates shows no bulking. It can be seen from the figure below, that fine sand bulks more and coarse sand bulks less.

From these it follows that the coarse aggregate also bulks but the bulking is so little that it is always neglected. Extremely fine sand and particularly the manufactured fine aggregate bulks as much as about 40 %.

Due to the bulking, fine aggregate shows completely unrealistic volume. Therefore, it is absolutely necessary that consideration must be given to the effect of bulking in proportioning the concrete by volume. If cognisance is not given to the effect of bulking, in case of volume batching, the resulting concrete is likely to be undersanded and harsh. It will also affect the yield of concrete for a given cement content.

The extent of bulking can be estimated by a simple field test. A sample of moist fine aggregate is filled into a measuring cylinder in the normal manner. Note down the level, say H1. Pour water into the measuring cylinder and completely inundate the sand and shake it. Since the volume of the saturated sand is the same as that of the dry sand, the inundated sand completely offsets the bulking effect. Note down the level of the sand say, H2. Then H1 - H2 shows the bulking of the sample of sand under test.

Percentage of Bulking = [(H1 - H2)/H2] x 100

In a similar way the bulking factor can be found out by filling the wet sand in a water tight measuring box (farma) up to the top and then pour water to inundate the sand. Then measure the subsidence of sand and express it as a percentage. This gives a more realistic picture of the bulking factor.

The field test to find out the percentage of bulking is so simple that this would be conducted in a very short time interval and the percentage of bulking so found out could be employed for correcting the volume of fine aggregate to be used. This can be considered as one of the important methods of field control to produce quality concrete. Since volume batching is not adopted for controlled concrete, the determination of the percentage of moisture content is not normally required. The quantity of water could be controlled by visual examination of the mix and by experience. The percentage of free moisture content is required to be determined and correction made only when weigh batching is adopted for production of quality concrete.

Tuesday, 19 September 2017

I am uploading my documents for you only on your request, So that you can download it from here. But one thing keep in mind that this is only the hand made notes. If you want detailed knowledge then watch my video on you tube. I am telling this because many important points i cover during making of video, so if you want to know in detail then watch my video.

I am uploading my documents for you only on your request, So that you can download it from here. But one thing keep in mind that this is only the hand made notes. If you want detailed knowledge then watch my video on you tube. I am telling this because many important points i cover during making of video, so if you want to know in detail then watch my video.

I am uploading my documents for you only on your request, So that you can download it from here. But one thing keep in mind that this is only the hand made notes. If you want detailed knowledge then watch my video on you tube. I am telling this because many important points i cover during making of video, so if you want to know in detail then watch my video.

Thursday, 20 July 2017

I am uploading my documents for you only on your request, So that you can download it from here. But one thing keep in mind that this is only the hand made notes. If you want detailed knowledge then watch my video on you tube. I am telling this because many important points i cover during making of video, so if you want to know in detail then watch my video.

Tuesday, 18 July 2017

I am uploading my documents for you only on your request, So that you can download it from here. But one thing keep in mind that this is only the hand made notes. If you want detailed knowledge then watch my video on you tube. I am telling this because many important points i cover during making of video, so if you want to know in detail then watch my video.

Saturday, 15 July 2017

After 24 hours, remove the internal wall panels by knocking out the wedges and pins. The wall panels are to be moved to upper floor through the slab opening as shown. The transferring of panels should be done in a systematically and orderly manner to ensure that the next cycle or level is not affected. Since all the panels are numbered with different colour identification scheme, these transfer process can be determined and planned in advance according to section of the building such as Room 1, Room 2, Bathroom are etc.

Sequence No. 2

After removing the external wall forms (the starter block [kicker] should remain undisturbed), the dismantled wall forms are moved to upper floor. Access Scaffolding is use for transferring of external wall panels from the ground floor level. For level 1 and above, an external working platform is fixed to the external wall. The external wall forms from level 1 onward shall be supported by the kickers. (These steps are to be repeated from one floor to another floor)

Sequence No. 3

After removing the wall panels, proceed to the slab panels after 36 hours by removing the long pins and wedges on the joint bars the end and middle beam section.

Sequence No. 4

Upon removing the Alu spans Mid Beams and Alu span cantilevers End Beams, the prop shall remained undisturbed during this process to support the concrete slab.

Sequence No. 5

Proceed to strip the slab panels and transfer to the next level according to the designated area and installation sequence.

Inner Corner is fixed to the Internal Wall panels by round pin & wedge. The Internal and External Wall Panels are hold by Flat Tie with Tie Bar Shield in between the panels.

Sequence No. 4

Repeat Sequence No. 3 to complete the assembly of both the Internal and External Wall Panels.

Sequence No. 5

Install Slab Corner on the top portion of the Wall Panels with round pin & Wedge.

Sequence No. 6

Alu spans mid beams / end beams and prop head are combined by beam splice bar with long pin and wedge at the bottom section.

Sequence No. 7

Start the assembly of the Slab Panels from the slab corner Internal. Subsequently, fill out the whole slab area by pinning the slab panels together with the Alu spans (Comprises of Alu spans and cantilevers) Mid Beams / End Beams.

Sequence No. 8

Additional Wall Panels (or Kickers) are fixed to the external Wall Panels to raise to the appropriate height to contain the slab concrete when it is poured.

Sequence No. 9

Upon completion of the installation and fixing of the wall and slab panels, a numbering sequence will be made for each of these panels with colour identification scheme to differentiate each of the unit area such as bedrooms, living room, bathroom etc. This numbering and colour identification scheme will ensure that each panels can be determined as to their exact location once they are transferred to the next level for installation.

Sequence No. 10

Always ensure that wall ties, pins and wedges are properly installed and secured before pouring concrete into the forms. Ensure that concrete pouring is distribute evenly throughout the wall panels section before commencing to cast the slabs level area.

Tuesday, 27 June 2017

1. The appropriate time for the stripping of formwork panels will vary according to the environment and type of concrete used. The formwork panels of the slabs section are usually dismantled after 36 hours. However, this process shall subject to approval of the project structural engineer after taking into consideration the grade of concrete used, additional props stand ordered, etc.

2. The Aluspans mid beams / end beams have to be removed first after dismantling the wall panels. Proceed by removing the long pins and wedges on the joint bars for the end and middle beams. However, the prop lengths are to remain undisturbed during this process to lend support for the weight of the concrete slab.

3. There shall be 2 sets of prop lengths to support the concrete slab. the first set of the prop stands will only be removed when the assembly of the third level/floor commences and also upon approval and consultation with the project structural engineer.

4. Proceed to dismantle the slab panels by commencing from the end of the slab area. Once the slab panels are dismantled, continue to remove the slab corners.

1. Formwork panels shall be removed without damaging the concrete. Reinforcement Bars or other tools shall not be used as a lever against the concrete in removing the formwork panels. Only panel puller shall be used for removing the wall panels.

2. The appropriate time for the stripping of formwork panels will vary according to the environment and type of concrete used. The formwork panels of the wall, column and beam section can be usually dismantled after 12 hours. However, this process shall subject to approval of the project structural engineer after taking into consideration the grade of concrete used, additional props stand ordered, etc.

3. Always ensure that the wall section panels are removed first follow by the column and beam sections.

4. For precautionary step, ensure that formwork panels are removed systematically and due care is to be taken to prevent any damages to the formwork panels and also finish surface of the concrete whenever possible.

5. For safety reason, ensure that no workers are facing the pin and wedges when removing using hammer. Pin and wedges removed are to be collected and placed in containers to minimize lost and replacement.

6. The dismantle formwork panels shall be transferred to the next level/floor for subsequent assembly process via the slab opening or staircase areas in an orderly manner and to the appropriate section/area immediately. This will eliminate the confusion and congestion in the dismantling area or level as a result of too many dismantled formwork panels lying on the floor area.

7. As the formwork panels are pre-numbered and if colour identification scheme is implemented, the transfer of panels can be determined and planned ahead according to the various sections/areas of one level/floor to the subsequent level/floor.

8. Always ensure that all the formwork panels are to be properly cleaned and applied with the form release agent to protect the surface of the formworks before re-used.

9. For the external wall section, the Starter Block (kickers) on the upper portion of the floor level shall remain intact to support and align the next level/floor of formwork panels that are going to be assembled. The assembly of the external formwork panels can be done by using the external working platforms that are fixed to the wall areas.

Sunday, 18 June 2017

1. Ensure that the position of the walls and column formwork are in accordance with the set up marking.

2. Check to ensure correct spacing of props for slab formwork.

3. Check the verticality and horizontality level of the wall and slab panels respectively.

4. Ensure that all pins, wedges and ties are properly secured and tightened.

5. Re-check the opening such as door and window panels are correct.

6. Re-check all popping stands to ensure its height are in accordance to drawings.

7. Adequate bracing (if necessary) to ensure stability.

8. Ensure cover blocks are placed correctly.

Monitoring During Concreting Process

1. Ensure site coordinators are available and on stand-by during the concreting process.

2. Always ensure that concrete pouring is disturbed evenly throughout the wall sections before commencing to cast the slab level areas. This is to prevent loading pressure on the formwork panels due to uneven casting.

3. Re-check the areas whenever cement slurry leakage is noted to determine the cause of it. Remedy work should be done immediately to ensure the concreting process is not affected.

4. During concreting, always ensure that immediate steps is taken to remove/clean all the access concrete that is stuck on the back of the formwork panels. Non removal will result in the formwork panels getting too heavy and also the scrapping task after the concrete has dried up becomes more tedious.

Friday, 16 June 2017

1. A numbering sequence / stenciling shall be given for each panel and is identified in accordance to unit area such as Living rooms, Kitchens, Bed rooms, Bathrooms, Common areas etc.

2. Colour identification scheme while numbering on each section or area will also eliminate the confusion that may arise due to the size. It can be identified such that Blue is for Room 1, Red is for Room 2, Green is for Living area etc.

3. By practicing the use of numbering system in combination with the colour identification scheme, it have been proven to avoid confusion and assist in the process of identification of panels position once they are transferred to the next level/floor.

Wednesday, 14 June 2017

1. External working platform brackets are used to provide a work area at the external wall section.

2. Once the first level is completed and external fromwork panels are removed, fix the external working brackets to the first floor level at position slightly below the kickers which are fixed on first floor external slab.

3. The external working brackets are secured to the external wall section from the inside using tie rods, nuts and bolts.

4. Once all the external working brackets are put in place, timber planks and strips are placed on the floors and railings respectively to create an external working platform for the assembly of the subsequent level of the external formwork panels and kickers.

5. Another set of external working brackets are later fixed on the subsequent level using the method as prescribed above.

6. Once the subsequent level of external formwork panels are fixed, the external working brackets at one level below are removed and moved to the subsequent level. This process is repeated until the completion of the subsequent floors.

Sunday, 11 June 2017

1. Always commence wall erection from the external corner of the wall section to ensure both joint external corner wall panels will support each other for standing position. Pin and wedges are to be used to secure the panels together. Always insert the pin from the inside out for easy removal of pin after concreting.

2. The formwork panels wall positioning is securely placed on the marked gridlines and level by way of fixing timber stoppers at the base of the outer side of the formwork panels at interval of 1 m. This would ensure that the formwork panels are not disposition during the concreting process.

3. Once the initial wall corner panels are assembled, place the wall corner panels on the allotted set up position.

4. Commence to erect simultaneously the balance of the wall panels from either side of the external wall panel.

5. Proceed to assemble the internal wall corner. Place these panels into the correct position on the lines which were set up by the surveyor. Proceed to assemble the balance of the internal wall at both sides.

6. The internal and external walls are to be held together by flat wall tie with wall tie sleeve and PVC cover. These wall tie sleeve and PVC cover are to be cut for the exact length of the wall thickness. Flat wall tie are to be coated with the Form Oil before each usage.

7. To determine and achieve the vertical accuracy of the formwork panels assembled before concreting process, several methods such as plumb bob, spirit level, theodolite equipment etc can be used. The simplified method of using a plumb bob with a string attached to it which is then suspended from the upper part of the formwork panels is used as a guide to determine the deviation from the vertical alignment of the panels.

8. Additional wall panels or starter blocks (kickers) are fixed on the external wall panels in accordance to the required height for the formation of the slab concrete. Check to ensure that the verticality of the Starter Blocks (kickers) is correctly aligned.

9. The Starter Blocks (kickers) shall remain at its position for the subsequent forming of next level wall.

Saturday, 10 June 2017

(1) The support works such as rebar, Mechanical & Electrical (M&D) and plumbing are to commence immediately once the set up is done. The same is to be ensured before installing the aluminium formwork.

(2) The support works for the slab section commence after the slab formwork panels are assembled.

(3) Cover blocks should be fixed on both sides of the rebar section for positioning and eliminate the rebar from resting on the surface of the formwork panels.

(4) Positioning of outlets for Electrical switch boxes to its correct alignment can be done by riveting the appropriate fit size mould to the formwork panels. The electrical switch boxes are then securely cap to the fit size mould and fasten by way of wiring to the formwork panels. Ensure that it is properly secured to prevent grouting from building up in the switch boxes.

Sunday, 28 May 2017

The project surveyor shall mark based on the approved construction drawings to ensure that the grid line and level of the foundation level is properly set up, marked for walls, columns etc. Leveling must be checked prior to commencement of formwork installation to ensure accurate positioning.

Formwork Panels

1. Cleaning of the surface and side panel of the formwork after each usage shall be done immediately using proper tools.

2. Ensure that all front and side panel of formwork is properly coated with recommended Form release agent that prevents from sticking and concrete build up aluminium form surfaces. It protects and prolongs the useful lives of the aluminium formwork.

3. The following precautions shall be taken when applying the Form oil on the aluminium panels

(a) The best results are obtained when a uniform application of Form oil is applied immediately following stripping and subsequent cleaning of the panels. Always ensure that the coated form surfaces are allowed to dry prior to placing concrete.

(b) Do not over apply. Excess Form oil can adversely affect performance and should be picked up promptly with rags.

Saturday, 13 May 2017

1. Prior to the arrival of the containers from the disembarking point to the project work site ; a Stock Yard is to be properly allocated and set up for the unloading of the formwork material and accessories.

2. This stock yard should preferably be located at close proximity or within the compound of the project work site, properly fenced up and security shall be of up most priority due to the high residue value in the secondary market for aluminium formwork material.

3. A workshop area for maintenance of formwork material is recommended to be set up at the project site to minimize the downtime in requisition of replacement panels.

4. The proposed stock yard and workshop area shall be flexible and re-adjustable to suit the working environment and project work site. As a result of the far away stock yard or workshop area the project progress will affect the targeted construction cycle time.

5. Upon arrival of formwork panels at project site, Site personnel shall ensure that the panels are stacked and stored according to sizes and marking using proper separator such as pallets for easy identification and allocation for subsequent distribution. (Dry Mockup will be assembled as per schemes at factory; this will eliminate the usual problematic discrepancies of odd size panels which need to be fabricated at project site).

Manpower

1. BSCC - HQ shall provide the estimated manpower requirement for the project based on the quantity of formwork panels to be supplied to achieve the required cycle time. This manpower requirement shall vary according to the size of formwork use on the building.

2. However, the manpower requirement for other supplementary trades which complement the formwork installation such as Mechanical & Electrical (M&E) services and rebar works need to be taken into consideration also.

3. A joint effort of all operations from formwork installer, rebar, plumbing, electrical and concreting workers need to be sunchronized to achieve the required cycle time.

4. Segregation and sustematically allocation of duties for each formwork team are required in ensuring optimization of productivity. Hence, each team shall be delegated or assigned to do specific jobs task on a daily basis to resemble a manufacturing production line. However, due consideration should be used in determining the level of experience and compatibility of persons when allocating tasks to minimize the risks.

Safety

1. Control measures should be taken to identify and minimize the hazards associated with work involving the assembly and dismantling of formwork equipment such as falls from height, slips, falling objects, noise, dust and manual tasks.

2. The external working brackets / platforms or scaffoldings should not be used to stack materials or equipment. This will lead to the persons working on it expose to additional hazards in relation to trips and slips or collapse of the external working brackets / platforms or scaffolding.

3. Minimize the working heights for persons performing the assembly and dismantling formwork.

4. Mixing of formwork components should be avoided to prevent unsafe installation such as mixing pins and braces which may lead to collapse of the formwork.

5. Do not allow drop stripping of formwork as it is an unsafe practice.

6. Partially assembled or dismantled formwork should be secured during break time to prevent against overturning or collapsing due to strong wind or accidently / unintentionally knock over by workers.

7. Electrical safety should be implemented for the safe use of electrical equipment.

Tuesday, 25 April 2017

I am uploading my documents for you only on your request, So that you can download it from here. But one thing keep in mind that this is only the hand made notes. If you want detailed knowledge then watch my video on you tube. I am telling this because many important points i cover during making of video, so if you want to know in detail then watch my video.

Sunday, 16 April 2017

Answer : Good Morning Sir, Its my
pleasure to introduce myself. My name is Mukesh Sah. I live in Kolkata. I have
done B.Tech in CE from Heritage Institute Of Technology. While coming to my family members,
there are four members included me. My father is a Business man and mother is a
home maker. Now coming to me, I am down to earth, sweet, smart, creative,
industrious. I am a cool hearted person, so usually see every difficulties with
a positive side and keep myself always smiling which makes me stronger even
more. My hobbies are playing Chess, especially in 2011 FIDE chess tournament,
Humpy Koneru inspires me alot. In my spare time I like to read newspapers and
travelling to my hometown which sounds good. Thank you for giving this
opportunity to introduce myself.

Q.2. Why do you want to work at
our company ?

Answer : Sir, Its a great
privilege for anyone to work in a reputed company like yours. When I read about
your company I found that my skills are matching your requirements, where I can
show my technical skills to contribute to the company growth. Apart from that
your company is a good platform to improve my knowledge, skills and personal
growth.

Q.3. What are your Strengths ?

Answer : My biggest strength is
my Confidence. Apart from that I am Hard working, Self motivated with Positive
attitude towards my career and my life. If I have problem then I think Its an
opportunity for me to express my ability.

Q.4. What are your weakness ?

Answer : I tend to try to do too
many things, leaving little time for myself. I am Straightforward and I cant
say no when someone ask for help.

Q.5. Why should I hire you ?

Answer : Sir, as I am a fresher,
I have theoretical knowledge but I need a platform where I can implement my
knowledge into practical field. I will put all my efforts for the good progress
of organization. As a fresher, I have no preset mind regarding work culture in
an organization and this will help me to adapt your working culture very soon.
Being puntual and sincere, I can finish the work given to me on time and try my
best to fulfill all the needs of company from me.

Q.6. Tell me what you know about
this company ?

Answer : Sir, we all know, it is
one of the fastest growing Infrastructure company in India. The work environment
of the company is decent. People feel proud to be the part of company as
company provides full support to their employees in professional front. It has
cross the branches in the world also. So, I have a good opportunity to show my
technical skill.

Q.7. What are your career goals ?

Answer : My Short term goal is to
get a job in reputed company like yours where i can utilize my skills and
improve my career path. My Long term goal is to be in respectable position
handling a bunch of peoples. I would like to see myself in a position where I
am responsible for creating huge profit and revenues for my company.

Q.8. How long would you expect to
work for us if hired ?

Answer : I will work with your
company as long as my presence benefits both the company and mine in parallel.
So that company gains good results and I can be in a good position to improve
my skills.

Q.9. How much salary do you
expect ?

Answer : As I am a fresher,
Salary is not an issue for me. Learning and gaining experience are my major
priorities. As your organization is one
of the most reputed organization, I just expect the salary offered by you is
the best in the industry.

Q.10. Do you have any questions
for me ?

Answer : First of all thank you
very much sir for being so much polite & friendly through out the session
with me, that I can express myself so easily. I want to ask, what are the
qualities you are expecting from fresher like us & could you please tell me
what should I improve before I join your company, obviously if I am selected,
If I am not selected today, your opinion will help me to the upcoming
interviews.

Sunday, 9 April 2017

I am uploading my documents for you only on your request, So that you can download it from here. But one thing keep in mind that this is only the hand made notes. If you want detailed knowledge then watch my video on you tube. I am telling this because many important points i cover during making of video, so if you want to know in detail then watch my video.

Sunday, 26 March 2017

I am uploading my documents for you only on your request, So that you can download it from here. But one thing keep in mind that this is only the hand made notes. If you want detailed knowledge then watch my video on you tube. I am telling this because many important points i cover during making of video, so if you want to know in detail then watch my video.

Wednesday, 22 March 2017

I am uploading my documents for you only on your request, So that you can download it from here. But one thing keep in mind that this is only the hand made notes. If you want detailed knowledge then watch my video on you tube. I am telling this because many important points i cover during making of video, so if you want to know in detail then watch my video.